CVE-2026-65319
Summary
by MITRE • 07/22/2026
Feedbin (commit 739884a) contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private article content by sending requests to the entries text API endpoint, which skips the authorization before-action filter entirely. Attackers can iterate sequential integer entry IDs through the GET /api/v2/entries/:id/text endpoint to enumerate and extract plain-text content of all stored articles, including private newsletter content, personal page-saves, and articles from any user's private subscriptions.
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Analysis
by VulDB Data Team • 07/22/2026
This vulnerability represents a critical authorization bypass flaw in the Feedbin RSS feed reader application that fundamentally undermines the security model of user data protection. The issue stems from a missing authorization check in the entries text API endpoint, specifically at the GET /api/v2/entries/:id/text path where the application fails to validate whether the requesting entity has proper access rights to the targeted article content. The vulnerability exists because the application's before-action filter that should enforce authentication and authorization is completely bypassed for this particular endpoint, allowing any unauthenticated attacker to directly access private content without presenting valid credentials or session tokens.
The technical implementation of this vulnerability enables systematic enumeration attacks through sequential integer ID iteration against the API endpoint. Attackers can systematically probe entry IDs to discover and extract plain-text content from all stored articles regardless of their privacy settings or user ownership. This flaw operates at the application layer where proper access control mechanisms should be enforced but are entirely absent, creating an information disclosure vulnerability that affects all users of the system. The impact extends beyond simple data exposure to include sensitive personal information, private newsletter content, and user-saved articles that should remain protected within individual user accounts.
The operational consequences of this vulnerability are severe as it allows attackers to perform large-scale content harvesting operations without any authentication requirements or rate limiting controls. This creates a comprehensive data exfiltration capability where threat actors can systematically collect private information from multiple users' subscriptions, potentially including sensitive business data, personal communications, or confidential news articles. The vulnerability affects the core principle of data confidentiality and user privacy within the application, as it allows unauthorized access to content that should only be accessible to authenticated users with proper permissions.
From a cybersecurity framework perspective, this vulnerability maps directly to CWE-285 (Improper Authorization) and aligns with ATT&CK technique T1071.004 (Application Layer Protocol: DNS) in scenarios where attackers might use the exposed API endpoints for data collection operations. The flaw represents a fundamental breakdown in the principle of least privilege, where the application fails to enforce proper access controls even at the API level. Organizations should implement immediate mitigations including mandatory authentication checks for all API endpoints, proper input validation on ID parameters, and rate limiting mechanisms to prevent systematic enumeration attacks. Additionally, comprehensive logging and monitoring of API access patterns should be implemented to detect and respond to unauthorized access attempts. The vulnerability also highlights the importance of thorough security testing including penetration testing and code review processes to identify missing authorization checks in RESTful API implementations.